[PATCH]enhanced 1:1 mapping(revision 1)

[zhao forrest]

Hi,

I revised the patch according to Joern's comments.
Now the basic data structure is:
vmalloc()/kmalloc + pointer array + slab cache.
Also I did some code re-constructure to make it more clean.

The patch is at 
http://www.infradead.org/~forrest/1:1mapping_r1.patch

Thanks,
Forrest